Grease pump



J1me w. s. TOWNSEND ET AL 3,715,522

GREASE PUMP Filed Sept. L925 ZZZ/672L 55: Char/a5 bczef/z, Wzllzamfifowrzaend,

Patented June 4, 1929.

UNITED STATES.

1,115,522 PATENT OFFICE.

WILLIAM S. TOWNSEND, OF ROCHESTER, PENNSYLVANIA, AND CHARLES SPAETH, OFCLEVELAND, OHIO, ASSIGNORS, BY MESNE ASSIGNMENTS, TO THE WAYNE PUMPCOMPANY, OF BALTIMORE, MARYLAND, A CORPORATION OF MARYLAND.

GREASE PUMP.

Application filed September This invention relates to a new and improvedgrease pump or the like and more particularly, to a grease pump adaptedto automatically discharge the material being handled. In types ofgrease pumps now in general use, a power stroke of the pump handle inone direction is necessary to fill the pump cylinder or similar chamberand a power stroke in the opposite direction is necessary to dischargethe material being handled.

It is an object of the present invention to provide a grease pump or thelikein which means are provided for'moving the pumping elements in onedirection and more particularly, in the direction adapted to dischargethe material.

It is also an object to provide in such a pump an adjustable fulcrum forthe pump mechanism whereby the length of pump stroke may be controlled.

It is a further object to provide a pump of this character in which thedischarge orifice is valve controlled so that the discharge of thegrease or other material may be regulated independently of the returnstroke of the piston.

It is-a further object to provide a construction which is simple indesign and operation and adapted for commercial manufacture.

Other and further objects will appear as the description proceeds.

We have illustrated in the accompanying drawings a preferred embodimentof our invention. v

In the drawings Figure 1 is a side elevation partly in section showingthe pump and its relation to a grease container, and

Figure 2 is a fragmentary modified form of fulcrum.

In the drawings, the grease container 11 is view showing a supportedupon the truck 12 being secured.

thereto by the band 13. The pump assembly is inserted into the containerthrough anopening in the top thereof, the pump top 14 fitting into andclosing the opening. The pump cylinder 15 is threaded into the pump top14 and extends downwardly into the container. The cylinder 15 carries atits lower end the foot valve spider 16 which carries the foot valveplate 17, foot valve stem 18 and foot valve stop pin 19.

The piston 20 is secured to the lower end of the piston rod 21 by nut 22and carries the.

stroke.

5, 1925. Serial No. 54,733.

,is piv'otally connected to the pump lever 2 The extended portion of thepump lever is provided with a pin 30, which is adapted to engage aselected hook portion 31 of the fulcruinmember 32. The discharge hose33. is

connected to the pump top 14 at 34 and the discharge end of the hose isprovided'with a nozzle 35 controlled by valve 36.

In the form of construction shown in Fig.-

ure 2, the pump lever 28 is provided with a single fulcrum link 37,rather than with the adjustable type of fulcrum shown in Figure 1.

In the operation of the pump, when the pump lever 28 is swung downwardlyto force the piston down into the cylinder, any mateso rial in the lowerportion of the cylinder will force the foot valve against the spider andthe material will be trapped in the cylinder. As the piston moves down,the material will thus be forced up through the ports 25 in the 35piston and beyond the piston valve plate 24;.

.. As the pump operating handleis released the spring 26 will force thepiston upwardly. The material above the piston immediately causes theseating of the valve plate 24 and the piston and valve plate force thematerial in the upper part of the cylinder to flow out through the tube33.

The discharge of material may be controlled by the valve 86. As the hoseand cylinder are filled with the material, the piston cannot rise untilthe valve 36 is opened and the material will then be forced from thenozzle 35 with such pressure as may be afforded by the strength of thespring 26. The amount of compression of the spring 26 under a fullstroke may be varied by using different fulcrum points on the fulcrumlink 32 to thereby vary the path of the piston This will substantiallyvary the amount of material discharged at each stroke and will also bethe means for selectively discharging materials of different viscositiesas it will be appreciated. that more force may be necessary for thesuccessful discharge of the heavier materials. As the piston rises thevacuum created below the piston will cause the foot valve'plate 17 torise under pressure of the material in the container and this materialwill flow up into the lower portion of the cylinder. It will be notedthat the spring 26 is located adjacent the cylinder walls and will notmaterially interfere with the flow of material through the cylinder.

We have shown one preferred form of our invention by way ofillustration, but it is to be understood we contemplate such changes andmodifications as come within the spirit and scope of the accompanyingclaims.

We claim 1. In a grease pump or the like, a pump cylinder having. aremote Valve controlled flexible outlet, a valve in the cylinder, apiston above said cylinder valve, a valve in said piston, a spring inthe cylinder below the piston, and piston operating means whereby thepiston may be forced into the cylinder to pass grease above thecylinder, and store energy 1n the spring for discharging grease, the sring acting to discharge grease only when t e outlet valve is open.

2. In a device of the character described, the combination of acontainer, discharge means therefor including a piston disposed in adischarge cylinder, said cylinder having a portion terminating in afitting provided with a flexible hose connection and another portion ofsaid cylinder terminating adjacent the bottom of said container, saidlast named portion being provided with a one-way valve 1 permittingsupply to said-cylinder upon discharge therefrom, resilient meansassociated with said piston for actuating said piston to chamber, apiston therein, automatic means for moving said piston to discharge apredetermined quantity of grease and to refill said chamber, a lever andrigid piston rod cooperating with said'piston for energizing saidautomatic means and to move the piston into a position to dischargegrease, and means providing a plurality of fulcrums for said leverwhereby the degree of energy stored in said automatic means'may bevaried and the path through which the stroke of said piston operates maybe varied.

' 4. In a device of the character described, the combination of acontainer, automatic discharge means therefor, said means including adischarge cylinder, an expulsion and re lenishing piston therefor,resilient means a apted to operatesaid piston to expel the contents fromsaid cylinder, piston actuating means including a rigid piston rodpivoted to an operating handle, said handle being movably fulcrumed withrespect to said cylinder for storing energy in said resilient means andoperating to charge said discharge cylinder, and multi-fulcrum meansassociated with said discharge cylinder and handle for controlling theamount of energy stored in said resilient means and for permittingexpelling operation of said piston'and resilient means.

5. In a device of the character described, the combination of acontainer, discharge means therefor including a discharge cylinder and apiston mounted therein, said cylinder having a portion terminating in afitting provided with a flexible hose connection, resilient meansassociated with said piston for actuating said piston to discharge, arigid piston rod associated with said piston adapted to be actuated tostore energy in said resilient means and operate said piston to fillsaid cylinder, means for actuating said piston rod, multi-fulcrum meansfor said last mentioned means for varying the path of the piston strokeand degree of energy stored in said resilent means, and remote controlmeans associated with said flexible connection for permitting actuationof said resilient means.

Signed at Cleveland, Ohio, this 28th day of August, 1925.

WILLIAM S. TOWNSEND. CHARLES SPAETH.

